This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | -790 |
| 3 | 12016 |
| 4 | -3748629 |
| 5 | 1730431227 |
| 6 | -3015428685 |
| 7 | 8172837003 |
| 8 | -34313104062 |
| 9 | 114738541304 |
| 10 | -620832653094 |
| 11 | 2474837590227 |
| 12 | -45157370341559 |
| 13 | 1726856191927439 |
| 14 | -6094457427533473 |
| 15 | 12791098836150787 |
| 16 | -51642743340781227 |
| 17 | 325724575136738920 |
| 18 | -1813676066719263909 |